mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 06:06:54 +07:00
7c00c31fc0
Byte-swapping of the port and IP address passed in to the multicast driver by the user used to happen in different places, which was a bug in itself. The port also was swapped before being printk-ed, which led to a misleading message. This patch moves the port swapping to the same place as the IP address swapping. It also cleans up the error paths of mcast_open. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
/*
|
|
* user-mode-linux networking multicast transport
|
|
* Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org>
|
|
*
|
|
* based on the existing uml-networking code, which is
|
|
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
|
|
* James Leu (jleu@mindspring.net).
|
|
* Copyright (C) 2001 by various other people who didn't put their name here.
|
|
*
|
|
* Licensed under the GPL.
|
|
*/
|
|
|
|
#include "linux/kernel.h"
|
|
#include "linux/init.h"
|
|
#include "linux/netdevice.h"
|
|
#include "linux/etherdevice.h"
|
|
#include "linux/in.h"
|
|
#include "linux/inet.h"
|
|
#include "net_kern.h"
|
|
#include "net_user.h"
|
|
#include "mcast.h"
|
|
|
|
struct mcast_init {
|
|
char *addr;
|
|
int port;
|
|
int ttl;
|
|
};
|
|
|
|
void mcast_init(struct net_device *dev, void *data)
|
|
{
|
|
struct uml_net_private *pri;
|
|
struct mcast_data *dpri;
|
|
struct mcast_init *init = data;
|
|
|
|
pri = dev->priv;
|
|
dpri = (struct mcast_data *) pri->user;
|
|
dpri->addr = init->addr;
|
|
dpri->port = init->port;
|
|
dpri->ttl = init->ttl;
|
|
dpri->dev = dev;
|
|
|
|
printk("mcast backend ");
|
|
printk("multicast adddress: %s:%u, TTL:%u ",
|
|
dpri->addr, dpri->port, dpri->ttl);
|
|
|
|
printk("\n");
|
|
}
|
|
|
|
static int mcast_read(int fd, struct sk_buff **skb, struct uml_net_private *lp)
|
|
{
|
|
*skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER);
|
|
if(*skb == NULL) return(-ENOMEM);
|
|
return(net_recvfrom(fd, (*skb)->mac.raw,
|
|
(*skb)->dev->mtu + ETH_HEADER_OTHER));
|
|
}
|
|
|
|
static int mcast_write(int fd, struct sk_buff **skb,
|
|
struct uml_net_private *lp)
|
|
{
|
|
return mcast_user_write(fd, (*skb)->data, (*skb)->len,
|
|
(struct mcast_data *) &lp->user);
|
|
}
|
|
|
|
static struct net_kern_info mcast_kern_info = {
|
|
.init = mcast_init,
|
|
.protocol = eth_protocol,
|
|
.read = mcast_read,
|
|
.write = mcast_write,
|
|
};
|
|
|
|
int mcast_setup(char *str, char **mac_out, void *data)
|
|
{
|
|
struct mcast_init *init = data;
|
|
char *port_str = NULL, *ttl_str = NULL, *remain;
|
|
char *last;
|
|
|
|
*init = ((struct mcast_init)
|
|
{ .addr = "239.192.168.1",
|
|
.port = 1102,
|
|
.ttl = 1 });
|
|
|
|
remain = split_if_spec(str, mac_out, &init->addr, &port_str, &ttl_str,
|
|
NULL);
|
|
if(remain != NULL){
|
|
printk(KERN_ERR "mcast_setup - Extra garbage on "
|
|
"specification : '%s'\n", remain);
|
|
return(0);
|
|
}
|
|
|
|
if(port_str != NULL){
|
|
init->port = simple_strtoul(port_str, &last, 10);
|
|
if((*last != '\0') || (last == port_str)){
|
|
printk(KERN_ERR "mcast_setup - Bad port : '%s'\n",
|
|
port_str);
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
if(ttl_str != NULL){
|
|
init->ttl = simple_strtoul(ttl_str, &last, 10);
|
|
if((*last != '\0') || (last == ttl_str)){
|
|
printk(KERN_ERR "mcast_setup - Bad ttl : '%s'\n",
|
|
ttl_str);
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
printk(KERN_INFO "Configured mcast device: %s:%u-%u\n", init->addr,
|
|
init->port, init->ttl);
|
|
|
|
return(1);
|
|
}
|
|
|
|
static struct transport mcast_transport = {
|
|
.list = LIST_HEAD_INIT(mcast_transport.list),
|
|
.name = "mcast",
|
|
.setup = mcast_setup,
|
|
.user = &mcast_user_info,
|
|
.kern = &mcast_kern_info,
|
|
.private_size = sizeof(struct mcast_data),
|
|
.setup_size = sizeof(struct mcast_init),
|
|
};
|
|
|
|
static int register_mcast(void)
|
|
{
|
|
register_transport(&mcast_transport);
|
|
return(1);
|
|
}
|
|
|
|
__initcall(register_mcast);
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|